.blockCls {
  border: 1px solid #ccc;
  width: 100px;
  height: 100px;
  margin: 10px 0;
}
.demo {
  border: 1px solid #ccc;
  width: 80px;
  margin: 10px;
  padding: 10px;
  display: inline-block;
  text-align: center;
}
.demo-tiny {
  border: 1px solid #ccc;
  margin: 5px 10px;
  padding: 2px;
  display: inline-block;
  cursor: default;
}
body {
  margin: 100px;
  position: relative;
}
.test-tip {
  border: 1px solid #ccc;
  width: 200px;
  height: 100px;
  display: inline-block;
}
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}
